TM 9-2350-238-34- 12 - 4 . T R O U B L E S H O O T I N G I N F O R M A T I O N ( C O N T ) .T a b l e 2 - 1 . D I R E C T S U P P O R T T R O U B L E S H O O T I N G ( C O N T )M A L F U N C T I ONT E S T O R I N S P E C T I O NC O R R E C T I V E A C T I ONH Y D R A U L I C S U S P E N S I O N L O C K O U T C Y L I N D E R A S S E M B L Y1 9 . H Y D R A U L I C S U S P E N S I O N L O C K O U T C Y L I N D E R A S S E M B L Y D O E S N O T A C T U A T E.Step 1. C h e c k f o r l o w h y d r a u l i c p r e s s u r e n e a r p u m p a n d s l i p r i n g u s i n g p r e s s u reg a g e . S t a r t e n g i n e a n d s e t H Y D P U M P / P T O C L U T C H s w i t c h O N.a. If pressure gage indicates about 450 psi, go to step 7.b. If pressure gage indicates less than 450 psi, go to step 2. SetH Y D P U M P / P T O C L U T C H s w i t c h O F F . S t o p e n g i n e . R e m o v ep r e s s u r e g a g e .Step 2. C h e c k f o r o p e n i m p a c t w r e n c h m a n u a l s h u t - o f f v a l v e .If open, close impact wrench manual shut-off valve.Step 3. C h e c k f o r d a m a g e d o r f a u l t y i m p a c t w r e n c h m a n u a l s h u t - o f f v a l v e .If damaged or faulty, replace impact wrench manual shut-off valve.R e f e r t o T M 9 - 2 3 5 0 - 2 3 8 - 2 0 - 1 .S t e p 4. C h e c k f o r d a m a g e d o r f a u l t y i m p a c t w r e n c h c o n t r o l c h e c k v a l v e.If damaged or faulty, replace impact wrench control check valve .R e f e r t o T M 9 - 2 3 5 0 - 2 3 8 - 2 0 - 1.Step 5. Check for damaged or faulty hull hydraulic relief valve.If damaged or faulty, replace hull hydraulic relief valve. Refer to TM9 - 2 3 5 0 - 2 3 8 - 2 0 - 1.S t e p 6 . I f p r o b l e m s t i l l e x i s t s , n o t i f y g e n e r a l s u p p o r t m a i n t e n a n c e.S t e p 7 . I n s t a l l p r e s s u r e g a g e t o l o c k o u t c y l i n d e r m a n i f o l d t e s t p o r t . S t a r t e n g i n e a nds e t H Y D P U M P / P T O C L U T C H s w i t c h O N.If pressure gage indicates a minimum of 450 psi, replace lockoutp r e s s u r e r e d u c i n g v a l v e . R e f e r t o T M 9 - 2 3 5 0 - 2 3 8 - 2 0 - 1 . S e t H YDP U M P / P T O C L U T C H s w i t c h O F F . S t o p e n g i n e . R e m o v e p r e s s u reg a g e .2 - 16
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